KR100848908B1 - Washing machine - Google Patents

Abstract

The present invention relates to a laundry apparatus, and in particular, by improving the structure of supplying water to the steam supply unit, it is possible to recognize the amount of water supplied by the user, and the steam generated in the steam supply unit can be smoothly provided to the laundry present at the bottom of the drum. To a new structure of laundry machine.

To this end, the present invention is the main body to form an appearance; An outer tub provided in the main body and connected to a drain pipe at a bottom thereof; A drum rotatably provided in the outtub; Is provided inside the main body, the water inlet communicated with any one surface of the main body exposed to the outside, the water reservoir for storing the water introduced through the water inlet, and the water stored in the water reservoir to evaporate Steam providing unit comprising a heating heater; In addition, the main steam supply pipe for providing the steam generated by the steam providing unit into the outer tub: provides a laundry apparatus comprising a.

Laundry unit, main steam supply, auxiliary steam supply, manual water supply

Description

Washing machine

Figure 1 is a side cross-sectional view for explaining the internal structure of a conventional drum washing machine

Figure 2 is a front sectional view for explaining the internal structure of a conventional general drum washing machine

Figure 3 is a side cross-sectional view for explaining the internal structure of the laundry apparatus according to the first embodiment of the present invention

Figure 4 is a front sectional view for explaining the internal structure of the washing apparatus according to the first embodiment of the present invention

5 is a front sectional view for explaining the internal structure of the laundry machine according to a second embodiment of the present invention;

6 is a front sectional view for explaining the internal structure of the laundry machine according to a third embodiment of the present invention;

7 and 8 are a front sectional view for explaining the internal structure of the laundry apparatus according to a fourth embodiment of the present invention

9 is a side cross-sectional view for explaining the internal structure of the laundry machine according to a fifth embodiment of the present invention;

10 is a front sectional view for explaining the internal structure of the laundry machine according to a fourth embodiment of the present invention;

Explanation of symbols for main parts of the drawings

100. Main unit 110. Slot

120. Door 130. Rim

140. Guide part 200. Out tub

210. Drainpipe 220. Storage

230. Heater 300. Drum

310. Opening 400,900. Steam provider

410. Water inlets 420,910. Water reservoir

430,920. Heater heater 440. Cover part

500. Main steam supply line 600. Outflow line

700. Auxiliary steam supply line 710. Flow control valve

800. Washing water circulation 810. Inlet pipe

820. Circulation pump 830. Guide tube

840. Injection nozzle 850. Valve

The present invention relates to a laundry apparatus, and more particularly, to a laundry apparatus of a new structure that enables washing of laundry using steam.

In general, the washing apparatus is largely divided into a pulsator washing machine in which the drum is erected in a vertical direction, and a drum washing machine in which the drum is laid in the horizontal direction.

Here, since the drum washing machine is laid down in the horizontal direction as described above, the drum washing machine performs washing by dropping the laundry introduced into the drum.

1 and 2 schematically show a conventional structure of the aforementioned drum washing machine.

That is, the drum washing machine includes a main body 10, an out tub 20 mounted in the main body 10, a drum 30 rotatably mounted in the out tub 20, and the drum 30. It is configured to include a driving means for driving.

Here, an inlet 11 through which laundry is introduced is formed on the front surface of the main body 10, and a door 40 that opens and closes the inlet is mounted at a peripheral portion of the inlet 11.

In addition, the outer tub 20 is provided with dampers 21 at both bottoms of the outer circumferential surface thereof and is mounted in a state of being supported in the main body 10.

At this time, the inner bottom of the tub 20 is provided with a washing water heater 60 is configured to enable the temperature control of the washing water used for washing.

In addition, the drum 30 is rotatably mounted in the outer tub 20, and a plurality of through holes 31 are formed on the circumferential surface of the drum 30 for inflow / outflow of wash water.

In addition, the driving means includes a drive motor 71 for driving the drum 30, and a belt 72 connected to transfer the driving force of the drive motor 71 to the drum 30.

In the conventional drum washing machine configured as described above, a washing stroke, a rinsing stroke, and a dehydration stroke are performed for a predetermined time according to a control signal of a controller (not shown) in a state in which laundry and a predetermined amount of detergent are put into the drum 30. Automatic washing proceeds for the laundry.

However, the conventional drum washing machine described above causes a problem that waste of water and power is caused because the amount of wash water used when washing laundry is excessively large.

That is, a large amount of washing water is required because the washing of the conventional laundry has to keep the laundry immersed in the washing water for a long time so that the contaminants contaminating the laundry are separated.

In addition, the conventional drum washing machine uses a large amount of washing water because the course for sterilizing the laundry is performed using the heated washing water after heating the washing water supplied into the outer tub through the heating of the washing water heater. It has a problem that the power consumption required for heating is large.

In recent years, by providing a separate steam providing unit to the inside of the drum washing machine to provide a high-temperature steam it is possible to sterilize the laundry with a small amount of wash water.

However, the above-described conventional steam providing unit is configured to automatically supply the amount of washing water required for steam generation, causing various problems as follows.

First, a separate water supply valve and a separate water supply passage for supplying the wash water to the steam providing unit had to be provided.

This not only caused an increase in manufacturing cost, but also caused a problem that the efficiency of the manufacturing operation was lowered due to the complexity of the structure.

Second, when a malfunction of a water supply valve or a failure of a sensor for detecting a water level in the steam providing unit occurs, there is a problem that a fire is generated as heat is generated even though water supply is not sufficiently performed.

This is a problem caused because the user could not recognize the water supply amount of the wash water supplied to the steam providing unit.

In addition, in addition to the above-described problems, the conventional steam providing unit is configured to inject steam into the drum from the upper side of the drum, so if the amount of the injected steam is not high enough or the injection pressure of the steam is not high enough, the drum The laundry present at the bottom of the steam does not have a smooth supply of the steam, and eventually has a problem in that the washing efficiency using the steam is inevitably lowered.

The present invention has been made in order to solve the various problems with the prior art described above, one object of the present invention is to improve the structure of the water supply to the steam providing unit washing apparatus of a new structure to enable the user to recognize the amount of water supply It is intended to provide.

In addition, another object of the present invention is to provide a laundry apparatus of a new structure in which steam generated in the steam providing unit can be smoothly provided to the laundry present at the bottom of the drum.

Laundry apparatus of the present invention for achieving the above object is a main body to form an appearance; An outer tub provided in the main body and connected to a drain pipe at a bottom thereof; A drum rotatably provided in the outtub; Is provided inside the main body, the water inlet communicated with any one surface of the main body exposed to the outside, the water reservoir for storing the water introduced through the water inlet, and the water stored in the water reservoir to evaporate Steam providing unit comprising a heating heater; And, the main steam supply pipe for providing the steam generated by the steam providing unit into the outer tub: characterized in that it comprises a.

The main steam supply pipe is preferably connected to the inner bottom of the outer tub and the inner bottom of the drum through the lower peripheral side of the outer tub.

Preferably, the washing machine further includes a washing water circulation unit configured to circulate the washing water in the outer tub and spray the washing water into the drum.

Laundry apparatus according to another aspect of the present invention for achieving the above object is a main body to form an appearance; An outer tub provided in the main body; A drum rotatably provided in the outtub; A steam providing unit provided inside the main body to generate steam; A main steam supply pipe configured to provide steam generated by the steam providing unit to a drum through a bottom space inside the outer tub; And, the auxiliary steam supply pipe for providing the steam generated by the steam providing unit to be injected toward the bottom space in the drum from the upper space in the drum, characterized in that it comprises a.

Washing apparatus according to another aspect of the present invention for achieving the above object is a main body to form an appearance; An outer tub provided in the main body; A drum rotatably provided in the outtub; A steam providing unit which penetrates one surface of the main body so as to be accommodated in the main body and includes a water storage container for storing water, and a heating heater configured to heat and evaporate the water stored in the water storage container; And, the main steam supply pipe for providing the steam generated by the steam providing unit into the outer tub: characterized in that it comprises a.

The water reservoir is preferably configured to be stored in a drawer type penetrating the upper front of the body.

Hereinafter, the washing apparatus according to each preferred embodiment of the present invention will be described in more detail with reference to FIGS. 3 to 10.

First, in FIG. 3 and FIG. 4 attached, a washing apparatus according to a first preferred embodiment of the present invention is shown.

That is, the washing apparatus of the first preferred embodiment of the present invention includes a main body 100, an out tub 200, a drum 300, a steam providing unit 400, and a main steam supply pipe 500. The drum type washing machine is set as an example.

Here, the main body 100 forms the appearance of the drum washing machine, the inlet 110 is formed on the front thereof, the outtub 200 is provided in a state supported in the main body 100.

In addition, the door 120 for opening and closing the inlet 110 is mounted at a portion where the inlet 110 of the main body 100 is formed.

In addition, a drain pipe 210 for draining the washing water (or washing water) is connected to the lower end of the outer tub 200.

In this case, a portion 220 to which the drain pipe 210 is connected is formed with a storage unit 220 protruding to the bottom thereof, and a heater 230 is provided inside the storage unit 220.

It is preferable that a temperature sensor (not shown) is further provided on the space where the heater 230 is provided, in order to accurately sense the temperature of the washing water heated by the heat generated by the heater 230. to be.

In addition, the drum 300 is rotatably installed in the outer tub 200, and is mounted such that a side opened toward the inlet 110 of the main body 100 is positioned.

At this time, a plurality of through holes 310 are formed on the circumferential surface of the drum 300 so that the washing water and steam supplied into the out tub 200 can be introduced into the drum 300.

Here, between the inlet 110 of the main body 100 and the front end of the drum 300 is a rim 130 for partitioning each other from the space inside the main body 100 is mounted.

And, the steam providing unit 400 is provided in the main body 100 is configured to generate a predetermined amount of steam.

The steam providing unit 400 is configured to vaporize water by high temperature heat, and is configured to include a water inlet 410, a water reservoir 420 and a heating heater 430.

The exothermic heater 430 is configured to heat and evaporate the water stored in the water reservoir 420, and is located in the water reservoir 420.

In addition, the water inlet 410 is communicated with any one surface of the main body is formed to be exposed to the outside, the water reservoir 420 is formed to store the water introduced through the water inlet 410.

The steam providing unit 400 is provided on the upper inside of the main body 100, the water inlet 410 of the steam providing unit 400 is formed to communicate with the upper surface of the main body 100 to be exposed to the outside This is preferred.

Such a structure is a structure for allowing a user to easily input water and for allowing a user to directly recognize the water supply amount of the water.

In this case, the water inlet 410 is most preferably formed so as not to protrude from the upper surface of the main body 100 to the outside, which is the interference of cleaning or other use of the upper surface of the main body 100 due to the water inlet 410 This is to prevent occurrence in advance.

In particular, a portion of the upper surface of the main body 100 to which the water inlet 410 is exposed is preferably further provided with a cover portion 440 for selectively closing the portion in communication with the water inlet 410.

At this time, the cover portion 440 is preferably configured to close the water inlet 410 in a stopper type.

Of course, although not shown, the cover portion 440 may be hinged to be rotatable or may be configured to selectively open and close the water inlet 410 while sliding the corresponding portion.

In addition, the main steam supply pipe 500 is a conduit formed to provide the steam generated by the steam providing unit 400 into the outer tub 200.

One end of the main steam supply pipe 500 is preferably connected to the upper end of the water reservoir 420 of the steam providing unit 400 or the upper surface of the water reservoir 420, the main steam supply pipe 500 The other end of the penetrating through the lower circumferential side of the outer tub 200, which is lower than the bottom surface of the drum 300 is preferably connected in communication with the inside of the outer tub 200.

This structure is intended to have the advantage that the steam can be evenly flowed all over the drum 300.

That is, considering that the steam is in a high temperature state and the hot steam flows to a relatively high position, when steam is supplied from the bottom in the outer tub 200 toward the inside of the drum 300, only the bottom in the drum 300 is supplied. Not even the supply of steam to the upper space in the drum 300 is possible.

This is a structure to solve the problem that the steam provided from the top of the conventional drum is not smoothly supplied to the bottom of the drum.

In particular, when the laundry is present at the bottom of the drum 300, the laundry is washed by steam provided by the bottom of the drum 300, for example, the washing performance is further improved.

On the other hand, since the steam providing unit 400 of the laundry apparatus according to the embodiment of the present invention as described above is configured to supply the water directly by the user may cause a problem that the water may be supercharged due to the user's mistake. have.

Accordingly, in the preferred embodiment of the present invention, the water reservoir 420 suggests that the outlet pipe 600 for outflowing the supercharged water is further provided.

One end of the outlet pipe 600 is connected in communication with the position of the water level in the water reservoir 420, and the other end of the outlet pipe 600 is in communication with the bottom space in the outer tub 200 It is preferable to connect.

Of course, the other end of the outlet pipe 600 may be connected to communicate with the interior of the drum (300). However, in this case, the laundry present in the drum 300 may be wetted by the water discharged through the outlet pipe 600. Of course, if the laundry is subjected to the normal washing process, it may be wet with the supercharged water, but if the laundry is dried until the laundry is completed, the laundry should not be wet with water.

In addition, the other end of the outlet pipe 600 may be connected to communicate with the drain pipe (210). However, in this case, since the steam generated by the operation of the steam providing unit 400 may be directly discharged to the drain pipe 210 through the outlet pipe 600, it is not preferable.

Therefore, the outlet side of the water outlet 600 is most preferably connected in communication with the inner space of the outer tub 200, in particular, the bottom side of the outer tub 200.

Of course, the outlet pipe 600 described above may be formed as a separate pipe from the main steam supply pipe 500 as shown in the embodiment, the main steam supply pipe 500 serves as the outlet pipe 600. It may also be configured to perform together.

Hereinafter, a series of processes for providing steam into the drum 300 during the washing process using the washing apparatus according to the preferred embodiment of the present invention as described above will be described in detail.

First, the stroke using steam during each washing process includes a variety of strokes, such as a brackish stroke, a soaking stroke, a washing stroke, a sterilization stroke, and after completion of drying.

If it is necessary to provide the steam for any one of each of these strokes through the upper surface of the body 100 to operate the cover portion 440 exposed to the outside to open the water inlet 410, the open water Water is supplied into the water reservoir 420 of the steam providing unit 400 through the inlet 410.

At this time, the water reservoir 420 inside the water level can be easily recognized because the user can visually check.

Of course, the supercharged water that may be caused in the process of introducing water into the water reservoir 420 is discharged into the outer tub 200 through the outlet pipe 600 connected to the water reservoir 420 to the supercharged water. There is no problem with water.

In addition, after the appropriate amount of water is introduced by the above-described series of processes, the cover 440 is closed and then the corresponding stroke is performed.

In this case, the heating heater 430 generates heat to evaporate the water stored in the water reservoir 420, and the generated steam is supplied to the bottom space in the outer tub 200 through the main steam supply pipe 500.

In addition, the steam is raised from the bottom of the drum 300 while passing through each through hole 310 of the drum 300, in the process of washing the laundry present in the bottom of the drum 300, for example, by steaming It may be washed or sterilized.

Of course, while the supply of steam as described above, the drum 300 is preferably controlled so that the continuous rotation (one-way rotation, or left and right reverse) is made.

As a result, when the above-described series of processes are performed for a set time, the heating of the heating heater 430 is stopped and the rotation of the drum 300 is stopped, and the corresponding stroke is terminated.

On the other hand, in the first embodiment of the present invention described above is configured so that steam is provided only to the bottom space in the drum 300 through the bottom of the outtub (200).

Accordingly, due to the laundry provided on the bottom space in the drum 300, the amount of steam provided to the portion of the upper space in the drum 300 is extremely small, and thus the steam of the laundry is uniformly up and down. Lack of provision may result in poor laundry performance.

Accordingly, the second embodiment of the present invention further provides a separate auxiliary steam supply pipe 700 in a series of structures according to the first embodiment of the present invention as shown in FIG. 5.

Here, the main steam supply pipe 500 for providing the steam generated by the steam providing unit 400 into the outer tub 200 is connected to provide the inside of the drum 300 through the bottom space of the outer tub 200. The auxiliary steam supply pipe 700 is configured to spray the steam generated by the steam providing unit 400 from the upper space in the drum 300 toward the bottom space in the drum 300.

At this time, the discharge end of the auxiliary steam supply pipe 700 is most preferably configured to communicate with the inside of the drum 300 through the rim 130.

In particular, the auxiliary steam supply pipe 700 is preferably configured to be branched from any one of the pipeline of the main steam supply pipe (500). This is to induce the simplification of the wiring by minimizing the conduit drawn out from the steam providing unit 400.

In this case, a flow path control valve 710 for supplying and / or blocking the selective steam to each of the pipelines is further provided at a portion where the pipeline between the main steam supply pipe 500 and the auxiliary steam supply pipe 700 is branched as described above. It is preferred to be provided.

This is different from when steam is provided from the lower part of the drum 300 according to an operation stroke, when steam is provided from the upper part of the drum 300, and when steam is simultaneously provided from the upper and lower parts of the drum 300. Because it can.

By the configuration of the laundry apparatus according to the second embodiment of the present invention, it is possible to simultaneously provide steam to the upper space in the drum 300 and the lower space in the drum 300 to provide a uniform steam up and down of the laundry. It is possible to obtain an improvement in washing performance as it can be received.

On the other hand, the structure of the laundry apparatus according to the present invention is not composed only of the structures of the first and second embodiments described above.

That is, the washing apparatus of the present invention can be various structural changes, which will be described below briefly for each embodiment.

First, Figure 6 attached is shown a laundry apparatus according to a third embodiment of the present invention.

That is, in the third embodiment of the present invention, the steam providing unit 400 is provided on the inner front side of the main body 100, and the water inlet 410 of the steam providing unit 400 is the front of the main body 100. It is suggested to be configured to be exposed to the outside in communication with.

This structure is intended to show that the water input position can be different, and the water inlet 410 is not limited to communicating with only one specific surface, and any one of each side of the main body as necessary. It can be variously changed to communicate with.

7 and 8 are shown a washing apparatus according to a fourth embodiment of the present invention.

That is, in the fourth embodiment of the present invention, the washing water in the outer tub 200 is circulated inside the main body 100 in the structure of the washing apparatus according to the first and second embodiments of the present invention described above. It is proposed that the wash water circulation part 800 spraying into the drum 300 is further provided.

The washing water circulation unit 800 is spraying the washing water toward the drum 300 when performing the lapping for the laundry and / or during the washing stroke so that the lapping for the laundry can be made more smoothly In addition, it is a structure for achieving an improvement in washing performance.

At this time, the washing water circulation unit 800 is provided on the inlet pipe 810 for receiving the washing water in the outer tub 200, the circulation pump for pumping the washing water is provided on the conduit of the inlet pipe (810) ( 820, a guide tube 830 for guiding the washing water pumped by the circulation pump 820 to an upper space in the main body 100, and the rim 130 while being coupled to the discharge side of the guide tube 830. It is preferably configured to include a spray nozzle 840 is provided to communicate with the inner upper end of the drum 300 to spray the pumped wash water.

In the inlet pipe 810 is preferably connected in communication with the drain pipe 210, the on-off valve for selectively opening and closing the two pipes on the pipe of the inlet pipe 810, or the pipe of the drain pipe 210 (850) ) Is further provided.

9 and 10 are shown a washing apparatus according to a fifth embodiment of the present invention.

That is, in the fifth embodiment of the present invention, the steam providing unit 900 is configured to include a water reservoir 910 and a heating heater 920, the water reservoir 910 is configured to be detachable from the main body 100. To present. This will be described in more detail as follows.

First, in the laundry apparatus according to the fifth embodiment of the present invention, the water reservoir 910 is provided to be accommodated in the main body 100 through one surface of the main body 100.

Preferably, it is advantageous to allow the water reservoir 910 to be received in a drawer type through the top of the front surface of the main body 100. This is for the user to conveniently operate.

Here, when the water reservoir 910 is accommodated inside the main body 100, a guide portion 140 supporting both bottom surfaces of the water reservoir 910 and guiding its mounting position is preferably provided. Guide portion 140 is preferably formed in the shape of a box body to form a predetermined storage space.

In addition, the exothermic heater 920 should be configured to heat and evaporate the water stored in the water reservoir 910.

Accordingly, in the fifth embodiment of the present invention, when the water reservoir 910 is accommodated in the main body 100, the heat heater (the heater) is disposed on the bottom space of the guide portion 140, which is the bottom of the water reservoir 910. 920 is arranged to be positioned.

At this time, the bottom of the water reservoir 910 is preferably formed of a metal material with high thermal conductivity.

Of course, although not shown, the heating heater 920 may be configured to be fixedly mounted in the water reservoir 910.

In addition, one end of the main steam supply pipe 500 for guiding the discharge flow of steam is connected in communication with the internal space of the guide portion 140, the other end of the main steam supply pipe 500 is the inner space of the outer tub 200 Connected in communication with.

At this time, the other end of the main steam supply pipe 500 is preferably connected to communicate with the inside of the outer tub 200 through the lower circumferential side of the outer tub 200.

In addition, the washing apparatus according to the fifth embodiment of the present invention described above is further provided with an auxiliary steam supply pipe 700 for injecting steam through the upper space of the outer tub 200 into the drum 300. .

The auxiliary steam supply pipe 700 is preferably configured to be branched from any one of the pipelines of the main steam supply pipe 500, steam is selectively supplied to each portion of the pipeline is branched through each pipeline, or Preferably, the flow path control valve 710 is operated to be blocked.

The discharge end of the auxiliary steam supply pipe 700 is preferably configured to communicate with the drum 300 through the rim 130.

In addition, the washing apparatus according to the fifth embodiment of the present invention described above circulates the washing water in the outer tub 200 inside the main body 100 to circulate the washing water sprayed into the drum 300 ( 800 is further provided.

The washing water circulation unit 800 is provided on the inlet pipe 810 for receiving the washing water in the outer tub 200, and a circulation pump 820 provided on the conduit of the inlet pipe 810 to pump the washing water. And, the guide pipe 830 for guiding the wash water pumped by the circulation pump 820 to the upper space in the main body 100, and coupled to the discharge side of the guide tube 830 inside the drum 300 It is provided to be in communication with the top is configured to include a spray nozzle 840 for spraying the pumped wash water.

In addition, although the structure of the laundry apparatus according to the present invention, although not shown, it is preferable to further include a separate water level sensor in the steam providing unit 400.

This is to reduce the inconvenience that the user should perform water supply through visual confirmation while allowing the water level of the water supplied into the water reservoir 420 to be more accurately sensed by the water level sensor.

In addition, the water level sensor may be generated when the level of water required according to the generation of steam is lower than the height of the heating heater 430, that is, when the heating heater 430 is exposed to the atmosphere by a rapid temperature rise. It may also be used to prevent any possible fire hazard.

Of course, when the water level detection sensor failure, such as a failure occurs, as shown in the above-described embodiment of the present invention, the user can visually watch the water level to be directly supplied water, as well as the structure of the water supply valve and the water supply path Since the structure and the like are omitted, it is significantly different from the structure that can check the water level supplied only by the conventional simple water level sensor.

As such, the laundry apparatus according to the present invention is a useful invention that can be variously modified as described above.

As described above, the washing apparatus according to the embodiment of the present invention enables the user to directly perform a structure for water supply to the steam providing unit, thereby eliminating the additional provision of the water supply valve and omitting the water supply flow path so that the manufacturing cost is reduced. Reduction and the efficiency of the manufacturing operation can be increased.

In addition, since the water supply amount of the water supplied to the steam providing unit can be directly recognized by the user, even if a malfunction or defect of the water level sensor occurs, it is possible to stably cope with it.

In addition, the laundry apparatus according to an embodiment of the present invention can be provided to the drum through the bottom space of the outer tub to the steam generated in the steam providing unit can be smoothly provided to the laundry present in the bottom of the drum to steam Has the effect of maximizing the washing efficiency used.

Claims (23)

A body forming an appearance; An out tub installed inside the main body and connected to a drain pipe at a bottom thereof; A drum rotatably installed inside the outer tub; A steam providing unit including a water reservoir configured to be selectively detachably mounted on an outer surface of the main body to accommodate water supplied from the outside, and a heating heater for heating the water accommodated in the water reservoir; And, And a main steam supply pipe configured to provide steam generated by the steam providing unit to the outer tub. The method of claim 1, The water reservoir is installed in a drawer-type storage, it is drawn to the outside when the user injects water, the washing apparatus characterized in that it is stored inside when the water is heated. The method according to claim 1 or 2, The heating heater is installed on the bottom of the water reservoir, washing machine, characterized in that for heating the water contained in the water reservoir when the water reservoir is accommodated. The method according to claim 1 or 2, The heating heater is characterized in that the washing device is installed integrally with the water reservoir. The method according to claim 1 or 2, The water reservoir is washing machine, characterized in that installed on the inner upper side of the main body. The method according to claim 1 or 2, The main steam supply pipe Washing apparatus is installed so as to pass through the lower portion of the outer tub and communicate with the inside of the outer tub. The method of claim 6, A storage part protruding downward is further formed at a portion to which the drain pipe of the outtub is connected, and a heater is provided inside the storage part. And the main steam supply pipe is connected to a position lower than a height of the bottom surface of the drum and higher than a height of the heater in the lower side of the outtub. The method according to claim 1 or 2, It is further provided with an auxiliary steam supply pipe branched from any one of the pipeline of the main steam supply pipe to inject steam into the drum through the upper space of the outer tub, Washing apparatus, characterized in that the flow path control valve is further provided to selectively supply steam to each of the pipelines in the branched portion between the main steam supply pipe and the auxiliary steam supply pipe. The method according to claim 1 or 2, Washing apparatus, characterized in that the inside of the main body is further provided with a washing water circulation unit for circulating the washing water in the inside of the outer tub and sprayed into the drum. The method of claim 9, The wash water circulation unit An inlet pipe receiving wash water in the outtub; A circulation pump provided on a conduit of the inlet pipe to pump laundry water; A guide tube for guiding the washing water pumped by the circulation pump to an upper space in the main body; And And a spray nozzle which is coupled to the discharge side of the guide tube and communicates with the inner upper end of the drum to inject the pumped wash water. The method of claim 10, The inlet pipe is installed washing apparatus characterized in that it is connected to the drain pipe. delete delete delete delete delete delete delete delete delete delete delete delete

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